Om Namah Shivaya is at the center in the Vedas and Tantras (ancient Scriptures) and finds its mention from the Yajurveda from the Shri Rudram hymn. Perceived being most efficient if, from the observe of Japa Yoga, in which the mantra is recurring verbally or mentally 108 times every day https://directorylandia.com/listings584818/facts-about-10-most-powerful-mantra-revealed